ostium
ostium An opening, derived from the Latin word for a door or opening. In Porifera, one of the openings through which water is drawn into the body. In Arthropoda, one of the openings in the wall of the heart into the pericardial (blood-filled) sinus.
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Opdyke, Irene Gut 1918-2003 , o·pen / ˈōpən/ • adj. 1. allowing access, passage, or a view through an empty space; not closed or blocked up: it was a warm evening and the window w… Gape , gape / gāp/ • v. [intr.] stare with one's mouth open wide, typically in amazement or wonder: they gaped at her as if she were an alien. ∎ be or becom… foramen , foramen A pore or opening. Applied to various openings, e.g. the pedicle foramen in Brachiopoda through which the pedicle emerges. In cephalopods (Ce… nares , nar·es / ˈne(ə)rēz/ • pl. n. (sing. nar·is / ˈne(ə)ris/ ) Anat. & Zool. the nostrils. DERIVATIVES: nar·i·al / -ēəl/ adj.
nares (nostrils) The paired… Anus , anus •pandanus •badness, madness, sadness •Magnus • aptness •fatness, patness •redness • wetness •anus, Coriolanus, heinous, Janus, Punta Arenas, Sil… Open Door , Open Door, maintenance in a certain territory of equal commercial and industrial rights for the nationals of all countries. As a specific policy, it…
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